package com.hurl.waguji.biz.download;

import java.util.ArrayList;
import java.util.List;

class UniqueChecker {
	List<String> checkValues = new ArrayList<String>();
	
	public static UniqueChecker getInstance(){
		return new UniqueChecker();
	}
	public boolean isUnique(String checkValue){
		if(checkValues.contains(checkValue)){
			return false;
		}else{
			checkValues.add(checkValue);
			return true;
		}
	}
}
